Experimental techniques and chemical analysis — IGCSE Chemistry (0971) questions by topic
Experimental techniques questions ask you to name the method for obtaining crystals from a solution such as copper(II) sulfate, identify the separation technique for removing excess solid after a reaction, describe observations from tests on two unknown solids, and identify the most suitable apparatus for accurately measuring a fixed volume of acid. Identify, describe, state, explain and predict cover naming techniques precisely and describing observed results in the correct chemical terms.
19 questions from 2025 papers sit on this page, worth from 1 to 18 marks. Because apparatus and technique questions reward exact precision, such as choosing a burette over a measuring cylinder for accurate volumes, submitting an answer for instant marking flags whether a close but less precise alternative has been chosen instead of the technique the question actually demands.
May–June 2025, Paper 11
Which substances can be used to detect the presence of water? 1 anhydrous cobalt(II) chloride 2 anhydrous copper(II) sulfate 3 litmus 4 methyl orange A 1 and 2 B 1 and 3 C 2 and 4…
Answer this question and get it marked →A student measures 25.00 cm^3 of dilute hydrochloric acid accurately. Which piece of apparatus is most suitable? A beaker B measuring cylinder C burette D dropping pipette
Answer this question and get it marked →Excess solid magnesium oxide is added to dilute nitric acid. Which separation technique is used to remove the excess solid magnesium oxide after the reaction finishes? A…
Answer this question and get it marked →Four different aqueous metal nitrates are tested separately with aqueous sodium hydroxide, with dilute sulfuric acid and with a flame test. Which row shows the correct set of…
Answer this question and get it marked →May–June 2025, Paper 12
Which diagram shows the correct level of solvent at the start of a chromatography experiment? Four diagrams (A-D) each show a beaker containing solvent with a piece of…
Answer this question and get it marked →Which process is used to separate a mixture of liquids with different boiling points? A dissolving B crystallisation C filtration D fractional distillation
Answer this question and get it marked →Four different colourless solutions are each tested separately with aqueous sodium hydroxide and with acidified aqueous silver nitrate. Which row shows the results for sodium…
Answer this question and get it marked →May–June 2025, Paper 21
Which item of apparatus is used to measure 25.0 cm^3 of aqueous sodium hydroxide? Each option shows a piece of laboratory glassware. A a teat pipette (dropping pipette). B a…
Answer this question and get it marked →Which method is used to obtain copper(II) sulfate crystals from an aqueous solution of copper(II) sulfate? A chromatography B condensation C evaporation D filtration
Answer this question and get it marked →A mixture of four different colourless amino acids is analysed by paper chromatography. The final chromatogram is shown: a strip of chromatography paper with a baseline near the…
Answer this question and get it marked →May–June 2025, Paper 22
Water is added separately to anhydrous copper(II) sulfate and to anhydrous cobalt(II) chloride. Which row shows the colour changes? anhydrous copper(II) sulfate anhydrous…
Answer this question and get it marked →Which item of apparatus is used to measure exactly 26.3 cm^3 of a liquid? A, B, C and D are diagrams of laboratory apparatus. A a burette (long graduated tube with a tap) B a…
Answer this question and get it marked →A mixture containing an aqueous salt and an insoluble salt is filtered. The diagram shows a filter funnel with filter paper (labelled X) sitting in a conical flask, with the…
Answer this question and get it marked →Pure ethanol has a melting point of -114 °C and a boiling point of 78 °C. What are the melting and boiling points of a sample of ethanol with glucose dissolved in it? melting…
Answer this question and get it marked →May–June 2025, Paper 51
You are provided with two solids: solid F and solid G. Do the following tests on solid F and solid G. Record all of your observations at each stage. Tests on solid F To the…
Answer this question and get it marked →May–June 2025, Paper 61
A student tests two solids: solid F and solid G. Tests on solid F Solid F is calcium carbonate. The student adds about 15 cm^3 of dilute hydrochloric acid to the sample of solid F…
Answer this question and get it marked →May–June 2025, Paper 62
Use the information in the description of the experiments and the thermometer diagrams to complete Table 2.1. (Complete the mass of anhydrous lithium chloride for experiments 2-5,…
Answer this question and get it marked →Tests on solid J. Solid J is iron(II) iodide. The student dissolves solid J in water to form solution J, which is divided into four portions. To the first portion of solution J,…
Answer this question and get it marked →Magnesium sulfate is a salt. Magnesium sulfate is soluble in water. The solubility of a salt is the mass of the salt, in g, that dissolves in 100 cm3 of water at a specified…
Answer this question and get it marked →Other IGCSE Chemistry topics
- Organic chemistry (31)
- The Periodic Table (29)
- Metals (23)
- Chemical reactions (14)
- Acids, bases and salts (14)
- Chemical bonding (11)
- Stoichiometry (11)
- Chemistry of the environment (10)
- States of matter (9)
- Electrochemistry (9)
- Atoms, elements and compounds (8)
- Chemical energetics (8)